LAARS Rheos+ RHHV - Install and Operating Manual - Manual (Page 7)

LAARS Heating Systems Page 6
(12) Firing Mode
F = Modulating
(13) Revision
2 = Second version
(14) Heat Exchanger
E = Glass-lined steel with copper tubes
F = Glass-lined steel with cupronickel tubes
(15) Control Option Code
X = Standard, meets CSD-1 boiler standard
A = Control Pack A: CSD-1, CA, FM, IL, IRI,
Alarm Bell
B = Control Pack B: CSD-1, CA, FM, IL, LDS, MN
F = Non CSD-1
(16) Pump Options
H = Pump mounted, hard water pump
N = Pump mounted, normal pump
S = Pump mounted, soft water pump
(volume water, high efficiency [condensing]
model only)
1.3 Warranty
LAARS Heating Systems’ Rheos+ appliances
are covered by a limited warranty. The owner should
fill out the warranty registration card and return it to
LAARS Heating Systems.
All warranty claims must be made to an
authorized LAARS Heating Systems representative
or directly to the factory. Claims must include the
serial number and model (this information can be
found on the rating plate), installation date, and name
of the installer. Shipping costs are not included in the
warranty coverage.
Some accessory items are shipped in separate
packages. Verify receipt of all packages listed on
the packing slip. Inspect everything for damage
immediately upon delivery, and advise the carrier of
any shortages or damage. Any such claims should be
filed with the carrier. The carrier, not the shipper, is
responsible for shortages and damage to the shipment
whether visible or concealed.
1.4 Dimensions
The overall dimensions are 34.5" (88cm)
wide, 65.75" (167cm) tall, 55" (140cm) deep. Other
dimensions can be found in Figure 1.
1.5 Locating the Appliance
The Rheos+ is for indoor installations only.
The appliance should be located to provide
clearances on all sides for maintenance and inspection.
It should not be located in an area where leakage of
any connections will result in damage to the area
adjacent to the appliance or to lower floors of the
structure.
When such a location is not available, it is
recommended that a suitable drain pan, adequately
drained, be installed under the appliance.
The appliance is design certified by CSA-
International for installation on combustible flooring;
in basements; in closets, utility rooms or alcoves.
Rheos+ Boilers or Water Heaters must never be
installed on carpeting. The location for the appliance
should be chosen with regard to the vent pipe lengths
and external plumbing. The unit shall be installed such
that the gas ignition system components are protected
from water (dripping, spraying, rain, etc.) during
operation and service (circulator replacement, control
replacement, etc.). When vented vertically, the Rheos+
must be located as close as practical to a chimney
or gas vent. If the vent terminal and/or combustion
air terminal terminate through a wall, and there is
potential for snow accumulation in the local area, both
terminals should be installed at an appropriate level
above grade.
The dimensions and requirements that are shown
in Table 1 should be met when choosing the locations
for the appliance:
Appliance Clearance From Suggested Service
Surface Combustible Material Clearance
inches
cm
inches
cm
Piping Side 1
2.5
18
46
Opposite Side 1
2.5
1
2.5
Top 1
2.5
24
61
Back 1 2.5
36
91
Front 1
2.5
36
91
Vent per UL1738 venting
system supplier’s
instructions
Table 1 - Clearances
1.6 Locating Pump-Mounted Water Heater
with Respect to Storage Tank(s)
For best results the Rheos+ water heater should
be located within 15 feet (4.6m) of the storage tank(s).
The pump is sized for 30 feet (9.1m) of piping.
Water heater pumps are sized for water hardness;
7.6 to 17 grains per gallon for normal water, greater
than 17 grains per gallon for hard water, and 1 to
7.5 grains per gallon for soft water. If the appliance
must be installed with longer piping runs, then larger
diameter pipe or tubing may be able to be used, in
some instances. Consult the factory for assistance.
1.7 Locating Pump-Mounted Boiler with
Respect to Return/Supply Header
Rheos+ units must be piped in primary-
secondary fashion because of the internal pump and
mixing system.
For the best results the Rheos+ Boiler should
be located within 15 feet (4.6m) of the supply and
return headers. The pump is sized for 30 feet (9.1m) of
piping, in most cases, enough for primary-secondary
piping systems.
If the appliance must be installed with longer piping
runs, then larger diameter tubing may be able to be used,
in some instances. Consult the factory for assistance.